Exxon Research and Engineering Company

Marcel Prillieux

Robert Tirtiaux

Marcel Robert

Pierre Dominique Marin

Robert M Laurent

Purification of sulphuric acid rich sulphonic acids particularly those prepared by oleum sulphonation, by water washing, treatment with an olefine and final heat treatment.

Sulphonic acids and sulphonates

Surface active agents for oil in water emulsions and oil recovery comprising salts of alkaryl sulphonic acids and organic bases containing at least one --(C.sub.2 H.sub.4 O).sub.n H where n is greater than 1.

Lubricating oil containing a surface active agent

The development of color of a concentrate of alkarylsulphonic acids is reduced by adding to and dissolving in the freshly prepared concentrate up to 5% of its weight of an organic compound having at least one ether group therein, the partial vapor pressure of the compound thus dissolved in the concentrate being negligible at the temperatures at which the concentrate is stored or transported. Examples of suitable organic compounds are aliphatic or phenolic monoethers, e.g. diethylene glycol.

Alkylaryl sulphonic acids

Surface-active agent

Oligomerizing propylene using a Friedel Crafts catalyst at a temperature in the range -10.degree. to 80.degree. C and hydrogenating the oligomer so obtained to produce oils useful as hydraulic fluids.

Hydrogenated olefine oligomers

Blends of paraffinic oils and hydrogenated polycyclopentadiene or polymethylcyclopentadiene.

Growing community of inventors

Mont Saint Aignan, France

Marcel Prillieux